Current Research

Adaptation and Resilience in Habitat Planning: Coupled Human and Natural Systems Models of Oak Management in a Changing Climate


​Oak forests provide important habitat for many of the highest priority wildlife species in southern Michigan. Maintenance and expansion of oak forests is a goal in many of the Michigan DNR’s State Game Area Master Plans. Despite their emphasis in wildlife management plans, oaks are neither stable nor increasing, except on very dry sites. Oaks on mesic sites in Michigan are shifting over time from fire-maintained oak systems to fire-suppressed maple systems. The research design for this study involves modeling oak forest sustainability at the landscape scale under realistic management and climate regimes. 
Ph.D. Candidate: Chris Hoving (co-advised by Dr. Gary Roloff)

Evaluating the Interaction of Emerging Diseases on White-tailed Deer Populations


​Deer management in Michigan faces serious threats from three significant diseases: chronic wasting disease (CWD), epizootic hemorrhagic disease (EHD), and bovine tuberculosis (bTB). Recent outbreaks of EHD and CWD in similar areas of southern Michigan demonstrate that we may soon face a situation where we need to understand the interaction of these diseases. We are working to couple disease prevalence information with spatial and temporal drivers of EHD and CWD to understand the role of two emerging and potentially interacting diseases on deer populations in Michigan. Further, we seek to better understand why these diseases have increased in frequency and distribution in Michigan. Ultimately, we hope to provide spatially-explicit models that anticipate future scenarios for deer management and disease risk.
Ongoing collaboration with Dr. Sonja Christensen

Group Size, Bioaccumulation, and Baiting: Quantifying Factors Affecting Disease Transmission Among Deer

A critical need for CWD management is to identify what factors influence aggregations of deer in agricultural regions and to quantify how those aggregations influence direct contacts (i.e., physical contact behavior) and bioaccumulation of feces at scales relevant for newly developed agent-based models for CWD. Understanding factors that influence congregations in agricultural regions and how deer interact under these circumstances would assist in epidemiological modeling for population management and control actions. The goal of this study is to evaluate factors influencing transmission of CWD among deer from an agricultural region of southern Michigan during the post-breeding period.
M.S. Student: Samantha Courtney (co-advised by Dr. Dwayne Etter)

Management Solutions for Chronic Wasting Disease


Preserving the health of white-tailed deer populations is a top priority for state and federal resource agencies because of their role in maintaining healthy ecosystems, preserving our hunting heritage, and providing a stable source of wildlife funding. The emergence of chronic wasting disease (CWD) in free-ranging cervid populations threatens the sustainable future of white-tailed deer because long-term population declines are associated with this disease. This project aims to develop scientifically-based surveillance and monitoring techniques through risk-based assessments of human and wildlife factors associated with CWD outbreaks. Using data from CWD-endemic areas provides valuable insight into how CWD spreads on the landscape and why the disease can show sporadic distribution. The ultimate goal of the project is to identify and remove diseased animals quickly before CWD becomes well-established.
Ph.D. Candidates: Noelle Thompson and Jonathan Trudeau

Monitoring Brown Bear Abundance in Katmai National Park, Alaska


Southwest Alaska’s Bristol Bay is home to a large brown bear population. This area also boasts one of the world's largest naturally occurring salmon runs. Katmai National Park‘s mission is to preserve brown bear habitat and the salmon spawning grounds where coastal bears derive much of their nutrients. This study will investigate changes in brown bear abundance along Brooks River over time, and investigate how factors such as variable salmon runs and increased park visitation may play a role in changing the carrying capacity for bears on the landscape. Understanding changes in brown bear abundance can help not only preserve bear viewing and wilderness experiences for future generations, but can also help preserve a healthy and successful salmon fishing industry. 
M.S. Student: Leslie Skora

Potential Wolf Expansion into the Northern Lower Peninsula of Michigan: Impacts on Cervid Ecology and Local Economies


​The recovery of gray wolves in the Great Lakes region has led to an established population in the Upper Peninsula of Michigan. Documented sightings of wolves in the Northern Lower Peninsula (NLP) of Michigan have highlighted the possibility of continued expansion across the state. The NLP features a sizable population of white-tailed deer as well as a population of elk, which are both considered valuable state resources. Thus, the appearance of wolves may not only impact wild cervid populations but also affect local economies. We will investigate potential impacts of wolf expansion into the NLP. The project will integrate ecological and economic models to better inform wildlife policy. 
Ph.D. Candidate: Nick Jaffe